Adhesive



Patented Oct. 25, 1938 p v T Q I UNITED STATES PATENT OFFICE ADHESIVE Harry 0. Roller, Glendale, Calif.

No Drawing. Application August 27, 1935, Serial No. 38,104

2 Claims. (01. 134-233) I An object of the present invention is the pro- Add gradually in order named; the whole comduction of an adhesive having improved adhesive bined by agitation in a sealed vessel. qualities. For metals, a priming coat of basic lead chro- A further object is to accurately control the mate and/or lead oxide orcarbonate with a 5 time during which the adhesive remains tacky vegetable oil, or a nitro-cellulose solution con- 5 in order to allow proper penetration of the diftaining these oxidants may first be applied.

ferent kinds of'surfaces to be joined by the ad- Burgundy pitch or resin gums, such as colohesive prior to the setting thereof, or in other phony, may be included. words to provide an'adhesive, certain ingredients Although the above formulae have been found of which may be varied in order that the ad- ,to produce an adhesive having especially good 10 hesive will set more quickly when joining together adhesive qualities, I propose to vary the above surfaces which are non-porous and vice versa. formulae within the following limits.

Another object is the provision of an adhesive having properties of joining together a greater 100 parts of alkyd resin dissolved 1n any of the variety of different substances of variant characgomtnergal solvents for example 15 teristics, and which is possessed of fire-resisting pmene denvatwes qualities- 3-8 parts of any of the following:

Additional objects will be found throughout Alkyd mauve the specification. or f naphthol One manner of making my improved adhesive or dlibutyl phthalate 20 when joining wood or glass is as follows: or t'q phos.pha.te

. or ab1et1c acid derivatives or combinations 100 parts of alkyd resin dissolved in any of the of same usual commercial solvents, for example or tri-phenyl phosphate P 8 d a /B Oxidized rape seed or China-wood oil 5 parts of any of the following: 1-2 parts cyclohexane or cyclohexane acetate Alkyd resin derivative 1-2 parts crude caoutchouc, dissolved in benzene or beta naphthol or petroleum solvent. 3; 2 2223 23 Y The substances which have non-oxidating or abietic acid derivatives or combinations (mantles any one of the followmg? 30 of same Alkyd resin derivative or tri-phenyl phosphate Beta naphthol 3 parts of oxidized rape seed or China-wood Di-butyl phthalate oil Tri-cresyl phosphate 2 parts cyclohexane or cyclohexane acetate Abietic acid derivatives v 35 2 parts crude caoutchouc, dissolved in benzene, Tri-phenyl phosphate or petroleum solvent The purpose of the non-oxidants is to control dd g adu y n Order a h whole the time during which the preparation remains 40 bined by agitation in a sealed vessel. tacky and by so doing the time that the adhesive 40 Another manner of makin y o d composition completely sets or hardens maybe 4 hesive when joining metals or a metal and ancontrolled, to thereby enable the substance to other kind of material, is as follows: entirely permeate the interstices or pores in the 100 parts of alkyd resin dissolved in any of t materials being joined together, whereby a more 15 4 usual commercial 1 t permanent and eflicient connection is estab- 3 parts of any of the-following; lished. 0n the other hand, if the non-oxidant Alkyd i derivative was omitted, experience has shown that adhesives or b t naphtha] of this type have a tendency to harden or set or di-butyl phthalate prematurely, or before the interstices, the pores i0 trL-eregyl phosphate or irregularities between the adjacent surfaces or tri-phenyl phosphate to be joined have been completely and entirely or abietic acid derivatives or combinations permeated by the adhesive elements of the comof same v position.

1 part of crude caoutchouc, dissolved in ben- It will of course be obvious that inasmuch as i5 zene, or petroleum solvent. the non-oxidant has the controlling efiect upon the time that the 'adhesive sets, a variation in the relative amounts of the non-oxidant to the other ingredients is permissible in order that the time between which the adhesive is applied to the surfaces of the substances to be joined and the time when the adhesive sets or solidifies may be varied in accordance with variations in the characteristics of the surfaces to be joined. This will be apparent when the fact is recognized that some substances have a greater amount of porosity than others, and some substances are so variant as to their surface characteristics as to require substantial differences in time in the setting of the adhesive. These differences in time of setting may be, as previously suggested, controlled by the amount of the non-oxidant that is added to the adhesive.

I additionally contemplate the use of Burgundy pitch or resin gums such as colophony. This substance is added in the event is it desired to produce a more tacky adhesive.

Alkyd resins are used since they are .manufactured products and are, therefore, uniform in composition, whereas the natural resins would not be. In addition to this, however, these resins are obtainable at low prices.

Phthalates, phenyl phosphates, beta-naphthol, oxidized oil, etc. are means of controlling brittleness or friability as distinguished from flexibility or elasticity. An example of this use would be the tempering of resins or similar substances with resin oil.

Cyciohexanes are used to assist in the formation of true solutions, rather than mixtures where the components are merely swollen to a very high degree. The fact that true solutions are used adds greatly to the adhesive properties of'the mixture and increases the number of surfaces to which the adhesive will stick and adds to the useful life of the composition.

Caoutchoucs are flexing components and are used to impart and control flexibility and increase the elasticity of the adhesive.

The combination of these items does not depend upon oxidation, heat, evaporation or the use of external means in order to complete the reaction, although heat may in some instances hasten it. The combination produces adhesive properties which are broader in application and adhere more firmly to a greater variety of surfaces than they would if applied alone. The particular adhesive properties developed by the combination of ingredients makes it possible to cement to materials now requiring special preparation for each, such as block tin, aluminum, vulcanized rubber, glass, Celluloid, lead, etc., and the adhesive can be used without a change in formula or composition upon practically any surface.

By suitable variations in the proportions, the consistency of the, adhesive may be controlled so that it may be applied by brush, spray, air pressure, dipping or by any other means ordinarily used.

Various materials may be applied to the adhesive after it has been applied upon a surface. These materials may be applied in solid or comminuted form by pneumatic, hydraulic or other pressure means. They may also be applied by gravity or any-other suitable means, although I prefer to use a spray gun provided with an extra large nozzle for this purpose.

While I'have herein disclosed with considerable particularity certain preferred manners of performing my invention I do not thereby desire or intend to limit myself solely thereto, for as hereto stated, the procedure may be modified, the precise proportions of the materials utilized may be varied and other materials having equivalent properties may be employed as desired without departing from the spirit and scope of the invention as defined in the appended claims.

I claim:

1. An adhesive consisting of parts of an alkyd resin in solution in an organic solvent, 3 to 8 parts of tri-cresyl phosphate, 3 to 8'parts of an oxidized rape seed oil, 1 to 2 parts of crude caoutchouc in solution, and 1 to 2 parts of cyclohexane.

2. An adhesive. consisting of 100 parts of an alkyd resin in solution in an organic solvent, 3 to 8 parts of a plasticizer of the class comprising beta naphthol, 'dibutyl phosphate, tri-cresyl phosphate and tri-phenyl phosphate, 3 to 8 parts of an oxidized drying or semi-drying oil, 1 to 2 parts of a crude caoutchouc in solution and 1 to 2 parts of cyclohexane.

I HARRY C. ROLLER. 

